<template>
    <el-image
        :src="`${realSrc}`"
        fit="cover"
        :style="`width:${realWidth};height:${realHeight};`"
        :preview-src-list="realSrcList"
    >
        <div slot="error" class="image-slot">
            <i class="el-icon-picture-outline"></i>
        </div>
    </el-image>
</template>

<script>
import { isExternal } from '@/utils/validate'

export default {
    name: 'ImagePreview',
    props: {
        src: {
            type: String,
            default: ''
        },
        width: {
            type: [Number, String],
            default: ''
        },
        height: {
            type: [Number, String],
            default: ''
        }
    },
    computed: {
        realSrc() {
            if (!this.src) {
                return
            }
            let real_src = this.src.split(',')[0]
            if (isExternal(real_src)) {
                return real_src
            }
            return process.env.VUE_APP_BASE_API + real_src
        },
        realSrcList() {
            if (!this.src) {
                return
            }
            let real_src_list = this.src.split(',')
            let srcList = []
            real_src_list.forEach(item => {
                if (isExternal(item)) {
                    return srcList.push(item)
                }
                return srcList.push(process.env.VUE_APP_BASE_API + item)
            })
            return srcList
        },
        realWidth() {
            return typeof this.width == 'string' ? this.width : `${this.width}px`
        },
        realHeight() {
            return typeof this.height == 'string' ? this.height : `${this.height}px`
        }
    }
}
</script>

<style lang="scss" scoped>
.el-image {
    border-radius: 5px;
    background-color: #ebeef5;
    box-shadow: 0 0 5px 1px #ccc;

    ::v-deep .el-image__inner {
        transition: all 0.3s;
        cursor: pointer;

        &:hover {
            transform: scale(1.2);
        }
    }

    ::v-deep .image-slot {
        display: flex;
        justify-content: center;
        align-items: center;
        width: 100%;
        height: 100%;
        color: #909399;
        font-size: 30px;
    }
}
</style>
